src/mesa/main/glthread.h

   1 /*
   2  * Copyright © 2012 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef _GLTHREAD_H
  25 #define _GLTHREAD_H
  26
  27 /* The size of one batch and the maximum size of one call.
  28  *
  29  * This should be as low as possible, so that:
  30  * - multiple synchronizations within a frame don't slow us down much
  31  * - a smaller number of calls per frame can still get decent parallelism
  32  * - the memory footprint of the queue is low, and with that comes a lower
  33  *   chance of experiencing CPU cache thrashing
  34  * but it should be high enough so that u_queue overhead remains negligible.
  35  */
  36 #define MARSHAL_MAX_CMD_SIZE (8 * 1024)
  37
  38 /* The number of batch slots in memory.
  39  *
  40  * One batch is being executed, one batch is being filled, the rest are
  41  * waiting batches. There must be at least 1 slot for a waiting batch,
  42  * so the minimum number of batches is 3.
  43  */
  44 #define MARSHAL_MAX_BATCHES 8
  45
  46 /* Special value for glEnableClientState(GL_PRIMITIVE_RESTART_NV). */
  47 #define VERT_ATTRIB_PRIMITIVE_RESTART_NV -1
  48
  49 #include <inttypes.h>
  50 #include <stdbool.h>
  51 #include "util/u_queue.h"
  52 #include "GL/gl.h"
  53 #include "compiler/shader_enums.h"
  54
  55 struct gl_context;
  56 struct gl_buffer_object;
  57 struct _mesa_HashTable;
  58
  59 struct glthread_attrib_binding {
  60    struct gl_buffer_object *buffer; /**< where non-VBO data was uploaded */
  61    int offset;                      /**< offset to uploaded non-VBO data */
  62    const void *original_pointer;    /**< restore this pointer after the draw */
  63 };
  64
  65 struct glthread_vao {
  66    GLuint Name;
  67    GLuint CurrentElementBufferName;
  68    GLbitfield UserEnabled; /**< Vertex attrib arrays enabled by the user. */
  69    GLbitfield Enabled; /**< UserEnabled with POS vs GENERIC0 aliasing resolved. */
  70    GLbitfield UserPointerMask;
  71    GLbitfield NonZeroDivisorMask;
  72
  73    struct {
  74       GLuint ElementSize;
  75       GLsizei Stride;
  76       GLuint Divisor;
  77       const void *Pointer;
  78    } Attrib[VERT_ATTRIB_MAX];
  79 };
  80
  81 /** A single batch of commands queued up for execution. */
  82 struct glthread_batch
  83 {
  84    /** Batch fence for waiting for the execution to finish. */
  85    struct util_queue_fence fence;
  86
  87    /** The worker thread will access the context with this. */
  88    struct gl_context *ctx;
  89
  90    /** Amount of data used by batch commands, in bytes. */
  91    int used;
  92
  93    /** Data contained in the command buffer. */
  94 #ifdef _MSC_VER
  95    __declspec(align(8))
  96 #else
  97    __attribute__((aligned(8)))
  98 #endif
  99    uint8_t buffer[MARSHAL_MAX_CMD_SIZE];
 100 };
 101
 102 struct glthread_state
 103 {
 104    /** Multithreaded queue. */
 105    struct util_queue queue;
 106
 107    /** This is sent to the driver for framebuffer overlay / HUD. */
 108    struct util_queue_monitoring stats;
 109
 110    /** Whether GLThread is enabled. */
 111    bool enabled;
 112
 113    /** The ring of batches in memory. */
 114    struct glthread_batch batches[MARSHAL_MAX_BATCHES];
 115
 116    /** Pointer to the batch currently being filled. */
 117    struct glthread_batch *next_batch;
 118
 119    /** Index of the last submitted batch. */
 120    unsigned last;
 121
 122    /** Index of the batch being filled and about to be submitted. */
 123    unsigned next;
 124
 125    /** Upload buffer. */
 126    struct gl_buffer_object *upload_buffer;
 127    uint8_t *upload_ptr;
 128    unsigned upload_offset;
 129    int upload_buffer_private_refcount;
 130
 131    /** Caps. */
 132    GLboolean SupportsBufferUploads;
 133
 134    /** Primitive restart state. */
 135    bool PrimitiveRestart;
 136    bool PrimitiveRestartFixedIndex;
 137    bool _PrimitiveRestart;
 138    GLuint RestartIndex;
 139    GLuint _RestartIndex[4]; /**< Restart index for index_size = 1,2,4. */
 140
 141    /** Vertex Array objects tracked by glthread independently of Mesa. */
 142    struct _mesa_HashTable *VAOs;
 143    struct glthread_vao *CurrentVAO;
 144    struct glthread_vao *LastLookedUpVAO;
 145    struct glthread_vao DefaultVAO;
 146    int ClientActiveTexture;
 147
 148    /** Currently-bound buffer object IDs. */
 149    GLuint CurrentArrayBufferName;
 150    GLuint CurrentDrawIndirectBufferName;
 151 };
 152
 153 void _mesa_glthread_init(struct gl_context *ctx);
 154 void _mesa_glthread_destroy(struct gl_context *ctx);
 155
 156 void _mesa_glthread_restore_dispatch(struct gl_context *ctx, const char *func);
 157 void _mesa_glthread_disable(struct gl_context *ctx, const char *func);
 158 void _mesa_glthread_flush_batch(struct gl_context *ctx);
 159 void _mesa_glthread_finish(struct gl_context *ctx);
 160 void _mesa_glthread_finish_before(struct gl_context *ctx, const char *func);
 161 void _mesa_glthread_upload(struct gl_context *ctx, const void *data,
 162                            GLsizeiptr size, unsigned *out_offset,
 163                            struct gl_buffer_object **out_buffer,
 164                            uint8_t **out_ptr);
 165 void _mesa_glthread_reset_vao(struct glthread_vao *vao);
 166
 167 void _mesa_glthread_BindBuffer(struct gl_context *ctx, GLenum target,
 168                                GLuint buffer);
 169 void _mesa_glthread_DeleteBuffers(struct gl_context *ctx, GLsizei n,
 170                                   const GLuint *buffers);
 171
 172 void _mesa_glthread_BindVertexArray(struct gl_context *ctx, GLuint id);
 173 void _mesa_glthread_DeleteVertexArrays(struct gl_context *ctx,
 174                                        GLsizei n, const GLuint *ids);
 175 void _mesa_glthread_GenVertexArrays(struct gl_context *ctx,
 176                                     GLsizei n, GLuint *arrays);
 177 void _mesa_glthread_set_prim_restart(struct gl_context *ctx, GLenum cap,
 178                                      bool value);
 179 void _mesa_glthread_PrimitiveRestartIndex(struct gl_context *ctx, GLuint index);
 180 void _mesa_glthread_ClientState(struct gl_context *ctx, GLuint *vaobj,
 181                                 gl_vert_attrib attrib, bool enable);
 182 void _mesa_glthread_AttribDivisor(struct gl_context *ctx, const GLuint *vaobj,
 183                                   gl_vert_attrib attrib, GLuint divisor);
 184 void _mesa_glthread_AttribPointer(struct gl_context *ctx, gl_vert_attrib attrib,
 185                                   GLint size, GLenum type, GLsizei stride,
 186                                   const void *pointer);
 187 void _mesa_glthread_DSAAttribPointer(struct gl_context *ctx, GLuint vao,
 188                                      GLuint buffer, gl_vert_attrib attrib,
 189                                      GLint size, GLenum type, GLsizei stride,
 190                                      GLintptr offset);
 191
 192 #endif /* _GLTHREAD_H*/